Licensed Well and Septic Contractors in Colorado

Colorado lists 1,060 licensed well and septic contractors: 208 well drillers and pump installers and 852 septic contractors. They are based in 51 counties and 182 cities. 18 license classes appear, covering roles such as installation / repair, pump installation and drilling / construction.

Checked against Weld County Department of Public Health & Environment, Colorado DWR - Licensed Drilling & Pump Installation Contractors, Larimer County Department of Health & Environment and El Paso County Public Health - Onsite Wastewater Treatment Systems (OWTS). Roster copy last refreshed 2026-08-19.

Browse by county or request free quotes.

Counties with the most listings based there

All 51 counties

Browse Colorado by county

Each listing sits under the county of the address on its license record, which can be a mailing address. 51 counties have listings based there.

Cities with the most listings based there

Septic Pumpers by city in Colorado

Septic Tank Pumping cost guide

Septic Installers by city in Colorado

Septic System Installation cost guide

Septic Inspectors by city in Colorado

Septic Inspection cost guide

Well Drillers by city in Colorado

Well Drilling cost guide

Well Pump Installers by city in Colorado

Well Pump Repair cost guide

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Looking for a specific contractor? Search by name, business name, or license number.

Hiring a well and septic professional in Colorado

Before you sign anything: confirm the license on this page is still active with the agency that issued it, ask for proof of insurance, and get at least three written quotes; pricing on this work varies widely by site conditions.

How do I check a well and septic professional's license in Colorado?

Use the license search to find the listing by name, business name, or license number, then confirm it with the agency that issued the license. Every listing links to the roster it came from.

What does well or septic work cost in Colorado?

Our cost guides give national ranges for well drilling, well pump repair, septic tank pumping, septic cleaning, repairs, and inspections. Site conditions, access, and local demand set the real number, so get at least three written quotes from licensed well and septic pros in Colorado.

Is a permit required?

Usually, for a new system or well and for most repairs, and the rules are set by the state or the county. Our Colorado permit guide covers who issues them and what they cover.

Licensed in Colorado, based in another state

3 well and septic pros hold a Colorado license but the address on the license record is in another state, so they aren't under a Colorado county.

Listings without a county

168 listings have no county we could place: the license record gives none, and its ZIP code or town doesn't settle one. Search by ZIP, or browse by the town on the record:

Permits and Colorado agency resources

Do I need a permit for well or septic work in Colorado? ›

• Colorado DWR - Licensed Drilling & Pump Installation Contractors

Where this Colorado data comes from

• Weld County Department of Public Health & Environment · source page
• Colorado DWR - Licensed Drilling & Pump Installation Contractors · source page
• Larimer County Department of Health & Environment · source page
• El Paso County Public Health - Onsite Wastewater Treatment Systems (OWTS) · source page